7O5H

Ribosomal methyltransferase KsgA bound to small ribosomal subunit


Experimental Data Snapshot

  • Method: ELECTRON MICROSCOPY
  • Resolution: 3.10 Å
  • Aggregation State: PARTICLE 
  • Reconstruction Method: SINGLE PARTICLE 

wwPDB Validation   3D Report Full Report


This is version 1.2 of the entry. See complete history


Literature

Structural basis of successive adenosine modifications by the conserved ribosomal methyltransferase KsgA.

Stephan, N.C.Ries, A.B.Boehringer, D.Ban, N.

(2021) Nucleic Acids Res 49: 6389-6398

  • DOI: https://doi.org/10.1093/nar/gkab430
  • Primary Citation of Related Structures:  
    7O5H

  • PubMed Abstract: 

    Biogenesis of ribosomal subunits involves enzymatic modifications of rRNA that fine-tune functionally important regions. The universally conserved prokaryotic dimethyltransferase KsgA sequentially modifies two universally conserved adenosine residues in helix 45 of the small ribosomal subunit rRNA, which is in proximity of the decoding site. Here we present the cryo-EM structure of Escherichia coli KsgA bound to an E. coli 30S at a resolution of 3.1 Å. The high-resolution structure reveals how KsgA recognizes immature rRNA and binds helix 45 in a conformation where one of the substrate nucleotides is flipped-out into the active site. We suggest that successive processing of two adjacent nucleotides involves base-flipping of the rRNA, which allows modification of the second substrate nucleotide without dissociation of the enzyme. Since KsgA is homologous to the essential eukaryotic methyltransferase Dim1 involved in 40S maturation, these results have also implications for understanding eukaryotic ribosome maturation.


  • Organizational Affiliation

    Institute of Molecular Biology and Biophysics, ETH Zurich (Swiss Federal Institute of Technology), Zürich, Otto-Stern-Weg 5, Zürich 8093, Switzerland.


Macromolecules

Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Ribosomal RNA small subunit methyltransferase AA [auth V]252Escherichia coli K-12Mutation(s): 0 
Gene Names: rsmAksgAFAZ83_07175
EC: 2.1.1.182
UniProt
Find proteins for P06992 (Escherichia coli (strain K12))
Explore P06992 
Go to UniProtKB:  P06992
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP06992
Sequence Annotations
Expand
  • Reference Sequence
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 3
MoleculeChains Sequence LengthOrganismDetailsImage
30S ribosomal protein S2C [auth B]225Escherichia coliMutation(s): 0 
UniProt
Find proteins for P0A7V0 (Escherichia coli (strain K12))
Explore P0A7V0 
Go to UniProtKB:  P0A7V0
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP0A7V0
Sequence Annotations
Expand
  • Reference Sequence
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 4
MoleculeChains Sequence LengthOrganismDetailsImage
30S ribosomal protein S4205Escherichia coliMutation(s): 0 
UniProt
Find proteins for P0A7V8 (Escherichia coli (strain K12))
Explore P0A7V8 
Go to UniProtKB:  P0A7V8
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP0A7V8
Sequence Annotations
Expand
  • Reference Sequence
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 5
MoleculeChains Sequence LengthOrganismDetailsImage
30S ribosomal protein S5158Escherichia coliMutation(s): 0 
UniProt
Find proteins for P0A7W1 (Escherichia coli (strain K12))
Explore P0A7W1 
Go to UniProtKB:  P0A7W1
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP0A7W1
Sequence Annotations
Expand
  • Reference Sequence
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 6
MoleculeChains Sequence LengthOrganismDetailsImage
30S ribosomal protein S6, fully modified isoform106Escherichia coliMutation(s): 0 
UniProt
Find proteins for P02358 (Escherichia coli (strain K12))
Explore P02358 
Go to UniProtKB:  P02358
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP02358
Sequence Annotations
Expand
  • Reference Sequence
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 7
MoleculeChains Sequence LengthOrganismDetailsImage
30S ribosomal protein S8G [auth H]129Escherichia coliMutation(s): 0 
UniProt
Find proteins for P0A7W7 (Escherichia coli (strain K12))
Explore P0A7W7 
Go to UniProtKB:  P0A7W7
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP0A7W7
Sequence Annotations
Expand
  • Reference Sequence
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 8
MoleculeChains Sequence LengthOrganismDetailsImage
30S ribosomal protein S11H [auth K]117Escherichia coliMutation(s): 0 
UniProt
Find proteins for P0A7R9 (Escherichia coli (strain K12))
Explore P0A7R9 
Go to UniProtKB:  P0A7R9
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP0A7R9
Sequence Annotations
Expand
  • Reference Sequence
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 9
MoleculeChains Sequence LengthOrganismDetailsImage
30S ribosomal protein S12I [auth L]123Escherichia coliMutation(s): 0 
UniProt
Find proteins for P0A7S3 (Escherichia coli (strain K12))
Explore P0A7S3 
Go to UniProtKB:  P0A7S3
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP0A7S3
Sequence Annotations
Expand
  • Reference Sequence
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 10
MoleculeChains Sequence LengthOrganismDetailsImage
30S ribosomal protein S15J [auth O]88Escherichia coliMutation(s): 0 
UniProt
Find proteins for P0ADZ4 (Escherichia coli (strain K12))
Explore P0ADZ4 
Go to UniProtKB:  P0ADZ4
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP0ADZ4
Sequence Annotations
Expand
  • Reference Sequence
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 11
MoleculeChains Sequence LengthOrganismDetailsImage
30S ribosomal protein S16K [auth P]82Escherichia coliMutation(s): 0 
UniProt
Find proteins for P0A7T3 (Escherichia coli (strain K12))
Explore P0A7T3 
Go to UniProtKB:  P0A7T3
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP0A7T3
Sequence Annotations
Expand
  • Reference Sequence
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 12
MoleculeChains Sequence LengthOrganismDetailsImage
30S ribosomal protein S17L [auth Q]80Escherichia coliMutation(s): 0 
UniProt
Find proteins for P0AG63 (Escherichia coli (strain K12))
Explore P0AG63 
Go to UniProtKB:  P0AG63
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP0AG63
Sequence Annotations
Expand
  • Reference Sequence
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 13
MoleculeChains Sequence LengthOrganismDetailsImage
30S ribosomal protein S18M [auth R]55Escherichia coliMutation(s): 0 
UniProt
Find proteins for P0A7T7 (Escherichia coli (strain K12))
Explore P0A7T7 
Go to UniProtKB:  P0A7T7
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP0A7T7
Sequence Annotations
Expand
  • Reference Sequence
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 14
MoleculeChains Sequence LengthOrganismDetailsImage
30S ribosomal protein S20N [auth T]86Escherichia coliMutation(s): 0 
UniProt
Find proteins for P0A7U7 (Escherichia coli (strain K12))
Explore P0A7U7 
Go to UniProtKB:  P0A7U7
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP0A7U7
Sequence Annotations
Expand
  • Reference Sequence
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 15
MoleculeChains Sequence LengthOrganismDetailsImage
30S ribosomal protein S21O [auth U]56Escherichia coliMutation(s): 0 
UniProt
Find proteins for P68679 (Escherichia coli (strain K12))
Explore P68679 
Go to UniProtKB:  P68679
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP68679
Sequence Annotations
Expand
  • Reference Sequence
Find similar nucleic acids by:  (by identity cutoff)  |  3D Structure
Entity ID: 2
MoleculeChains LengthOrganismImage
16S rRNAB [auth A]964Escherichia coli
Sequence Annotations
Expand
  • Reference Sequence
Small Molecules
Ligands 1 Unique
IDChains Name / Formula / InChI Key2D Diagram3D Interactions
MG
Query on MG

Download Ideal Coordinates CCD File 
AA [auth A]
AB [auth A]
AC [auth A]
AD [auth A]
AE [auth A]
AA [auth A],
AB [auth A],
AC [auth A],
AD [auth A],
AE [auth A],
AF [auth A],
BA [auth A],
BB [auth A],
BC [auth A],
BD [auth A],
BE [auth A],
BF [auth A],
CA [auth A],
CB [auth A],
CC [auth A],
CD [auth A],
CE [auth A],
CF [auth A],
DA [auth A],
DB [auth A],
DC [auth A],
DD [auth A],
DE [auth A],
DF [auth A],
EA [auth A],
EB [auth A],
EC [auth A],
ED [auth A],
EE [auth A],
EF [auth A],
FA [auth A],
FB [auth A],
FC [auth A],
FD [auth A],
FE [auth A],
FF [auth A],
GA [auth A],
GB [auth A],
GC [auth A],
GD [auth A],
GE [auth A],
GF [auth A],
HA [auth A],
HB [auth A],
HC [auth A],
HD [auth A],
HE [auth A],
HF [auth A],
IA [auth A],
IB [auth A],
IC [auth A],
ID [auth A],
IE [auth A],
IF [auth A],
JA [auth A],
JB [auth A],
JC [auth A],
JD [auth A],
JE [auth A],
JF [auth A],
KA [auth A],
KB [auth A],
KC [auth A],
KD [auth A],
KE [auth A],
KF [auth A],
LA [auth A],
LB [auth A],
LC [auth A],
LD [auth A],
LE [auth A],
LF [auth A],
MA [auth A],
MB [auth A],
MC [auth A],
MD [auth A],
ME [auth A],
MF [auth A],
NA [auth A],
NB [auth A],
NC [auth A],
ND [auth A],
NE [auth A],
NF [auth A],
OA [auth A],
OB [auth A],
OC [auth A],
OD [auth A],
OE [auth A],
OF [auth A],
P [auth A],
PA [auth A],
PB [auth A],
PC [auth A],
PD [auth A],
PE [auth A],
PF [auth A],
Q [auth A],
QA [auth A],
QB [auth A],
QC [auth A],
QD [auth A],
QE [auth A],
QF [auth A],
R [auth A],
RA [auth A],
RB [auth A],
RC [auth A],
RD [auth A],
RE [auth A],
RF [auth A],
S [auth A],
SA [auth A],
SB [auth A],
SC [auth A],
SD [auth A],
SE [auth A],
SF [auth A],
T [auth A],
TA [auth A],
TB [auth A],
TC [auth A],
TD [auth A],
TE [auth A],
TF [auth A],
U [auth A],
UA [auth A],
UB [auth A],
UC [auth A],
UD [auth A],
UE [auth A],
UF [auth D],
V [auth A],
VA [auth A],
VB [auth A],
VC [auth A],
VD [auth A],
VE [auth A],
VF [auth E],
W [auth A],
WA [auth A],
WB [auth A],
WC [auth A],
WD [auth A],
WE [auth A],
WF [auth F],
X [auth A],
XA [auth A],
XB [auth A],
XC [auth A],
XD [auth A],
XE [auth A],
XF [auth H],
Y [auth A],
YA [auth A],
YB [auth A],
YC [auth A],
YD [auth A],
YE [auth A],
YF [auth K],
Z [auth A],
ZA [auth A],
ZB [auth A],
ZC [auth A],
ZD [auth A],
ZE [auth A],
ZF [auth U]
MAGNESIUM ION
Mg
JLVVSXFLKOJNIY-UHFFFAOYSA-N
Experimental Data & Validation

Experimental Data

  • Method: ELECTRON MICROSCOPY
  • Resolution: 3.10 Å
  • Aggregation State: PARTICLE 
  • Reconstruction Method: SINGLE PARTICLE 

Structure Validation

View Full Validation Report



Entry History & Funding Information

Deposition Data


Funding OrganizationLocationGrant Number
Swiss National Science FoundationSwitzerland31003A_182341

Revision History  (Full details and data files)

  • Version 1.0: 2021-06-16
    Type: Initial release
  • Version 1.1: 2021-06-23
    Changes: Database references
  • Version 1.2: 2021-06-30
    Changes: Database references